Bit puller
AssigneeThe Boeing Company
InventorKareem Gamal Shehab
Life of this patent
Estimating the term…
Abstract
A bit puller incorporates an inner element with a longitudinal axis and having a central shaft, a base with external threads and an engagement mechanism internal to the inner element adapted to engage a drill bit. An outer element is concentric with the inner element and has a foot portion for engaging a work piece. Internal threads in the outer element are adapted to engage the external threads of the base wherein rotation of the inner element with respect to the outer element withdraws the inner element along the longitudinal axis.
Claims20
A method for extraction of a drill bit comprising:
- engaging a drill bit in an mechanism internal to an inner element;
- receiving an outer element having internal threads on external threads on the inner element;
- rotating the inner element with respect to the outer element urging a foot portion of the outer element into contact with a workpiece;
- withdrawing the inner element on a longitudinal axis thereby extracting the drill bit.
A method for extraction of a drill bit, the method comprising:
- engaging a drill bit with an inner element with a longitudinal axis and having
- a central shaft,
- a base, said base having external threads, and,
- an engagement mechanism internal to the inner element wherein rotation of the inner element about the longitudinal axis engages the engagement mechanism on the drill bit;
- engaging the inner element with an outer element concentric with the inner element and having
- a first bifurcated section and a second bifurcated section attached with a longitudinal hinge, said sections rotatable about the longitudinal hinge to an open position to be received about the inner element and rotatable to a closed position engaging the internal threads with the external threads;
- a first lever arm extending from the first bifurcated section and a second lever arm extending from the second bifurcated section, said first and second lever arms aligned with the bifurcated sections in the closed position;
- locking the first and second levers in the closed position;
- engaging a work piece with foot portions on the first and second bifurcated sections;
- and
- rotating the central shaft urging the inner element from the outer element with the engaged internal and external threads.
A method for extraction of a drill bit, the method comprising:
- engaging a drill bit with inner element, said inner element having a longitudinal axis and
- a central shaft having a cavity and tapered threads circumscribing the central shaft, said cavity adapted to contract to engage the drill bit on an inner wall,
- a base, said base having external threads, and,
- a grip having a bore with complimentary threads engaging the tapered threads,
- engaging the inner element in an outer element, the outer element having
- a foot portion for engaging a work piece, and
- internal threads adapted to engage the external threads of the base, wherein the threads of the inner element, the tapered threads of the central shaft, external threads of the base, and inner threads of the outer element are complimentary and are configured with pitch direction selected to allow rotation of the grip in a single direction;
- rotating the grip contracting the cavity to engage the drill bit;
- and
- further rotating the grip to rotate the inner element respective to the outer element urging the inner element upward from a workpiece.
Dependencies are inferred from the claim text.